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Fixing indentation bugs with new tricks

This commit is contained in:
Allen Webster 2017-11-28 18:31:10 -05:00
parent 734b1af24b
commit da748f608c
7 changed files with 71 additions and 37 deletions
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2
4coder_API/types.h
View File

@ -274,7 +274,7 @@ ENUM(uint32_t, Command_Line_Interface_Flag){
/* DOC(An Auto_Indent_Flag field specifies the behavior of an auto indentation operation.) */
ENUM(uint32_t, Auto_Indent_Flag){
/* DOC(If AutoIndent_ClearLine is set, then any line that is only whitespace will be cleared to contain nothing at all. otherwise the line is filled with whitespace to match the nearby indentation.) */
/* DOC(If AutoIndent_ClearLine is set, then any line that is only whitespace will be cleared to contain nothing at all, otherwise the line is filled with whitespace to match the nearby indentation.) */
AutoIndent_ClearLine = 0x1,
/* DOC(If AutoIndent_UseTab is set, then when putting in leading whitespace to align code, as many tabs will be used as possible until the fine grained control of spaces is needed to finish the alignment.) */
AutoIndent_UseTab = 0x2,

72
4coder_auto_indent.cpp
View File

@ -24,7 +24,7 @@ TYPE: 'drop-in-command-pack'
#endif
//
// Generic Line Indenter
// Wrapper Implementation
//
struct Hard_Start_Result{
@ -288,10 +288,6 @@ find_anchor_token(Application_Links *app, Buffer_Summary *buffer, Cpp_Token_Arra
return(token);
}
//
// Indent Rules
//
struct Indent_Parse_State{
int32_t current_indent;
int32_t previous_line_indent;
@ -336,7 +332,11 @@ get_indentation_marks(Application_Links *app, Partition *part, Buffer_Summary *b
if (token_ptr < tokens.tokens + tokens.count){
token = *token_ptr;
}
// Back up and consume this token too IF it is a scope opener.
if (token.type == CPP_TOKEN_BRACE_OPEN || token.type == CPP_TOKEN_BRACKET_OPEN){
--token_ptr;
}
for (;line_number < line_end;){
prev_token = token;
@ -413,11 +413,50 @@ get_indentation_marks(Application_Links *app, Partition *part, Buffer_Summary *b
default:
if (indent.current_indent > 0){
if (!(prev_token.flags & CPP_TFLAG_PP_BODY) && !(prev_token.flags & CPP_TFLAG_PP_DIRECTIVE)){
switch (prev_token.type){
case CPP_TOKEN_BRACKET_OPEN: case CPP_TOKEN_BRACE_OPEN: case CPP_TOKEN_BRACE_CLOSE: case CPP_TOKEN_SEMICOLON: case CPP_TOKEN_COLON: case CPP_TOKEN_COMMA: case CPP_TOKEN_COMMENT: break;
default: this_indent += tab_width;
bool32 statement_complete = false;
Cpp_Token *prev_usable_token_ptr = token_ptr - 1;
Cpp_Token prev_usable_token = {0};
if (prev_usable_token_ptr >= tokens.tokens){
prev_usable_token = *prev_usable_token_ptr;
}
// Scan backwards for the previous token that actually tells us about the statement.
bool32 has_prev_usable_token = true;
#define NotUsable(T) \
(((T).flags&CPP_TFLAG_PP_BODY) || ((T).flags&CPP_TFLAG_PP_DIRECTIVE) || ((T).type == CPP_TOKEN_COMMENT))
if (NotUsable(prev_usable_token)){
has_prev_usable_token = false;
for (--prev_usable_token_ptr;
prev_usable_token_ptr >= tokens.tokens;
--prev_usable_token_ptr){
prev_usable_token = *prev_usable_token_ptr;
if (!NotUsable(prev_usable_token)){
has_prev_usable_token = true;
break;
}
}
}
#undef NotUsable
if (!has_prev_usable_token){
statement_complete = true;
}
else{
if (prev_usable_token.type == CPP_TOKEN_BRACKET_OPEN ||
prev_usable_token.type == CPP_TOKEN_BRACE_OPEN ||
prev_usable_token.type == CPP_TOKEN_BRACE_CLOSE ||
prev_usable_token.type == CPP_TOKEN_SEMICOLON ||
prev_usable_token.type == CPP_TOKEN_COLON ||
prev_usable_token.type == CPP_TOKEN_COMMA){
statement_complete = true;
}
}
if (!statement_complete){
this_indent += tab_width;
}
}
}
@ -610,11 +649,6 @@ buffer_auto_indent(Application_Links *app, Buffer_Summary *buffer, int32_t start
// Commands
//
static void
auto_tab_whole_file_by_summary(Application_Links *app, Buffer_Summary *buffer){
buffer_auto_indent(app, buffer, 0, buffer->size, DEF_TAB_WIDTH, DEFAULT_INDENT_FLAGS | AutoIndent_FullTokens);
}
CUSTOM_COMMAND_SIG(auto_tab_whole_file)
CUSTOM_DOC("Audo-indents the entire current buffer.")
{
@ -622,7 +656,7 @@ CUSTOM_DOC("Audo-indents the entire current buffer.")
View_Summary view = get_active_view(app, access);
Buffer_Summary buffer = get_buffer(app, view.buffer_id, access);
auto_tab_whole_file_by_summary(app, &buffer);
buffer_auto_indent(app, &global_part, &buffer, 0, buffer.size, DEF_TAB_WIDTH, DEFAULT_INDENT_FLAGS | AutoIndent_FullTokens);
}
CUSTOM_COMMAND_SIG(auto_tab_line_at_cursor)
@ -632,7 +666,7 @@ CUSTOM_DOC("Auto-indents the line on which the cursor sits.")
View_Summary view = get_active_view(app, access);
Buffer_Summary buffer = get_buffer(app, view.buffer_id, access);
buffer_auto_indent(app, &buffer, view.cursor.pos, view.cursor.pos, DEF_TAB_WIDTH, DEFAULT_INDENT_FLAGS | AutoIndent_FullTokens);
buffer_auto_indent(app, &global_part, &buffer, view.cursor.pos, view.cursor.pos, DEF_TAB_WIDTH, DEFAULT_INDENT_FLAGS | AutoIndent_FullTokens);
move_past_lead_whitespace(app, &view, &buffer);
}
@ -644,7 +678,7 @@ CUSTOM_DOC("Auto-indents the range between the cursor and the mark.")
Buffer_Summary buffer = get_buffer(app, view.buffer_id, access);
Range range = get_range(&view);
buffer_auto_indent(app, &buffer, range.min, range.max, DEF_TAB_WIDTH, DEFAULT_INDENT_FLAGS | AutoIndent_FullTokens);
buffer_auto_indent(app, &global_part, &buffer, range.min, range.max, DEF_TAB_WIDTH, DEFAULT_INDENT_FLAGS | AutoIndent_FullTokens);
move_past_lead_whitespace(app, &view, &buffer);
}
@ -657,12 +691,10 @@ CUSTOM_DOC("Inserts a character and auto-indents the line on which the cursor si
View_Summary view = get_active_view(app, access);
Buffer_Summary buffer = get_buffer(app, view.buffer_id, access);
buffer_auto_indent(app, &buffer, view.cursor.pos, view.cursor.pos, DEF_TAB_WIDTH, DEFAULT_INDENT_FLAGS | AutoIndent_ExactAlignBlock);
buffer_auto_indent(app, &global_part, &buffer, view.cursor.pos, view.cursor.pos, DEF_TAB_WIDTH, DEFAULT_INDENT_FLAGS | AutoIndent_ExactAlignBlock);
move_past_lead_whitespace(app, &view, &buffer);
}
#endif
// BOTTOM

2
4coder_default_hooks.cpp
View File

@ -245,7 +245,7 @@ OPEN_FILE_HOOK_SIG(default_file_save){
int32_t is_virtual = 0;
if (automatically_indent_text_on_save && buffer_get_setting(app, &buffer, BufferSetting_VirtualWhitespace, &is_virtual)){
if (is_virtual){
auto_tab_whole_file_by_summary(app, &buffer);
buffer_auto_indent(app, &global_part, &buffer, 0, buffer.size, DEF_TAB_WIDTH, DEFAULT_INDENT_FLAGS | AutoIndent_FullTokens);
}
}
#endif

4
4coder_default_include.cpp
View File

@ -413,7 +413,7 @@ long_braces(Application_Links *app, char *text, int32_t size){
buffer_replace_range(app, &buffer, pos, pos, text, size);
view_set_cursor(app, &view, seek_pos(pos + 2), true);
buffer_auto_indent(app, &buffer, pos, pos + size, DEF_TAB_WIDTH, DEFAULT_INDENT_FLAGS | AutoIndent_FullTokens);
buffer_auto_indent(app, &global_part, &buffer, pos, pos + size, DEF_TAB_WIDTH, DEFAULT_INDENT_FLAGS | AutoIndent_FullTokens);
move_past_lead_whitespace(app, &view, &buffer);
}
@ -485,7 +485,7 @@ CUSTOM_DOC("Surround the range between the cursor and mark with an '#if 0' and a
}
range = get_range(&view);
buffer_auto_indent(app, &buffer, range.min, range.max, DEF_TAB_WIDTH, DEFAULT_INDENT_FLAGS | AutoIndent_FullTokens);
buffer_auto_indent(app, &global_part, &buffer, range.min, range.max, DEF_TAB_WIDTH, DEFAULT_INDENT_FLAGS | AutoIndent_FullTokens);
move_past_lead_whitespace(app, &view, &buffer);
}
}

18
4coder_generated/command_metadata.h
View File

@ -206,9 +206,9 @@ int32_t line_number;
};
static Command_Metadata fcoder_metacmd_table[185] = {
{ PROC_LINKS(allow_mouse, 0), "allow_mouse", 11, "Shows the mouse and causes all mouse input to be processed normally.", 68, "C:\\work\\4ed\\code\\4coder_default_framework.h", 47, 230 },
{ PROC_LINKS(auto_tab_line_at_cursor, 0), "auto_tab_line_at_cursor", 23, "Auto-indents the line on which the cursor sits.", 47, "C:\\work\\4ed\\code\\4coder_auto_indent.cpp", 43, 628 },
{ PROC_LINKS(auto_tab_range, 0), "auto_tab_range", 14, "Auto-indents the range between the cursor and the mark.", 55, "C:\\work\\4ed\\code\\4coder_auto_indent.cpp", 43, 639 },
{ PROC_LINKS(auto_tab_whole_file, 0), "auto_tab_whole_file", 19, "Audo-indents the entire current buffer.", 39, "C:\\work\\4ed\\code\\4coder_auto_indent.cpp", 43, 618 },
{ PROC_LINKS(auto_tab_line_at_cursor, 0), "auto_tab_line_at_cursor", 23, "Auto-indents the line on which the cursor sits.", 47, "C:\\work\\4ed\\code\\4coder_auto_indent.cpp", 43, 662 },
{ PROC_LINKS(auto_tab_range, 0), "auto_tab_range", 14, "Auto-indents the range between the cursor and the mark.", 55, "C:\\work\\4ed\\code\\4coder_auto_indent.cpp", 43, 673 },
{ PROC_LINKS(auto_tab_whole_file, 0), "auto_tab_whole_file", 19, "Audo-indents the entire current buffer.", 39, "C:\\work\\4ed\\code\\4coder_auto_indent.cpp", 43, 652 },
{ PROC_LINKS(backspace_char, 0), "backspace_char", 14, "Deletes the character to the left of the cursor.", 48, "C:\\work\\4ed\\code\\4coder_base_commands.cpp", 45, 81 },
{ PROC_LINKS(backspace_word, 0), "backspace_word", 14, "Delete characters between the cursor position and the first alphanumeric boundary to the left.", 94, "C:\\work\\4ed\\code\\4coder_default_include.cpp", 47, 147 },
{ PROC_LINKS(basic_change_active_panel, 0), "basic_change_active_panel", 25, "Change the currently active panel, moving to the panel with the next highest view_id. Will not skipe the build panel if it is open.", 132, "C:\\work\\4ed\\code\\4coder_base_commands.cpp", 45, 514 },
@ -230,7 +230,7 @@ static Command_Metadata fcoder_metacmd_table[185] = {
{ PROC_LINKS(decrease_face_size, 0), "decrease_face_size", 18, "Decrease the size of the face used by the current buffer.", 57, "C:\\work\\4ed\\code\\4coder_base_commands.cpp", 45, 615 },
{ PROC_LINKS(decrease_line_wrap, 0), "decrease_line_wrap", 18, "Decrases the current buffer's width for line wrapping.", 54, "C:\\work\\4ed\\code\\4coder_base_commands.cpp", 45, 592 },
{ PROC_LINKS(delete_char, 0), "delete_char", 11, "Deletes the character to the right of the cursor.", 49, "C:\\work\\4ed\\code\\4coder_base_commands.cpp", 45, 63 },
{ PROC_LINKS(delete_current_scope, 0), "delete_current_scope", 20, "Deletes the braces surrounding the currently selected scope. Leaves the contents within the scope.", 99, "C:\\work\\4ed\\code\\4coder_scope_commands.cpp", 46, 472 },
{ PROC_LINKS(delete_current_scope, 0), "delete_current_scope", 20, "Deletes the braces surrounding the currently selected scope. Leaves the contents within the scope.", 99, "C:\\work\\4ed\\code\\4coder_scope_commands.cpp", 46, 474 },
{ PROC_LINKS(delete_file_query, 0), "delete_file_query", 17, "Deletes the file of the current buffer if 4coder has the appropriate access rights. Will ask the user for confirmation first.", 125, "C:\\work\\4ed\\code\\4coder_base_commands.cpp", 45, 1061 },
{ PROC_LINKS(delete_line, 0), "delete_line", 11, "Delete the line the on which the cursor sits.", 45, "C:\\work\\4ed\\code\\4coder_default_include.cpp", 47, 351 },
{ PROC_LINKS(delete_range, 0), "delete_range", 12, "Deletes the text in the range between the cursor and the mark.", 62, "C:\\work\\4ed\\code\\4coder_base_commands.cpp", 45, 121 },
@ -259,8 +259,8 @@ static Command_Metadata fcoder_metacmd_table[185] = {
{ PROC_LINKS(goto_prev_jump_sticky, 0), "goto_prev_jump_sticky", 21, "If a buffer containing jump locations has been locked in, goes to the previous jump in the buffer, skipping sub jump locations.", 127, "C:\\work\\4ed\\code\\4coder_jump_sticky.cpp", 43, 499 },
{ PROC_LINKS(hide_filebar, 0), "hide_filebar", 12, "Sets the current view to hide it's filebar.", 43, "C:\\work\\4ed\\code\\4coder_base_commands.cpp", 45, 555 },
{ PROC_LINKS(hide_scrollbar, 0), "hide_scrollbar", 14, "Sets the current view to hide it's scrollbar.", 45, "C:\\work\\4ed\\code\\4coder_base_commands.cpp", 45, 541 },
{ PROC_LINKS(highlight_next_scope_absolute, 0), "highlight_next_scope_absolute", 29, "Finds the first scope started by '{' after the cursor and puts the cursor and mark on the '{' and '}'.", 102, "C:\\work\\4ed\\code\\4coder_scope_commands.cpp", 46, 367 },
{ PROC_LINKS(highlight_prev_scope_absolute, 0), "highlight_prev_scope_absolute", 29, "Finds the first scope started by '{' before the cursor and puts the cursor and mark on the '{' and '}'.", 103, "C:\\work\\4ed\\code\\4coder_scope_commands.cpp", 46, 385 },
{ PROC_LINKS(highlight_next_scope_absolute, 0), "highlight_next_scope_absolute", 29, "Finds the first scope started by '{' after the cursor and puts the cursor and mark on the '{' and '}'.", 102, "C:\\work\\4ed\\code\\4coder_scope_commands.cpp", 46, 368 },
{ PROC_LINKS(highlight_prev_scope_absolute, 0), "highlight_prev_scope_absolute", 29, "Finds the first scope started by '{' before the cursor and puts the cursor and mark on the '{' and '}'.", 103, "C:\\work\\4ed\\code\\4coder_scope_commands.cpp", 46, 387 },
{ PROC_LINKS(highlight_surrounding_scope, 0), "highlight_surrounding_scope", 27, "Finds the scope enclosed by '{' '}' surrounding the cursor and puts the cursor and mark on the '{' and '}'.", 107, "C:\\work\\4ed\\code\\4coder_scope_commands.cpp", 46, 346 },
{ PROC_LINKS(if0_off, 0), "if0_off", 7, "Surround the range between the cursor and mark with an '#if 0' and an '#endif'", 78, "C:\\work\\4ed\\code\\4coder_default_include.cpp", 47, 444 },
{ PROC_LINKS(increase_face_size, 0), "increase_face_size", 18, "Increase the size of the face used by the current buffer.", 57, "C:\\work\\4ed\\code\\4coder_base_commands.cpp", 45, 603 },
@ -322,7 +322,7 @@ static Command_Metadata fcoder_metacmd_table[185] = {
{ PROC_LINKS(paste_and_indent, 0), "paste_and_indent", 16, "Paste from the top of clipboard and run auto-indent on the newly pasted text.", 77, "C:\\work\\4ed\\code\\4coder_default_include.cpp", 47, 373 },
{ PROC_LINKS(paste_next, 0), "paste_next", 10, "If the previous command was paste or paste_next, replaces the paste range with the next text down on the clipboard, otherwise operates as the paste command.", 156, "C:\\work\\4ed\\code\\4coder_clipboard.cpp", 41, 108 },
{ PROC_LINKS(paste_next_and_indent, 0), "paste_next_and_indent", 21, "Paste the next item on the clipboard and run auto-indent on the newly pasted text.", 82, "C:\\work\\4ed\\code\\4coder_default_include.cpp", 47, 380 },
{ PROC_LINKS(place_in_scope, 0), "place_in_scope", 14, "Wraps the code contained in the range between cursor and mark with a new curly brace scope.", 91, "C:\\work\\4ed\\code\\4coder_scope_commands.cpp", 46, 403 },
{ PROC_LINKS(place_in_scope, 0), "place_in_scope", 14, "Wraps the code contained in the range between cursor and mark with a new curly brace scope.", 91, "C:\\work\\4ed\\code\\4coder_scope_commands.cpp", 46, 405 },
{ PROC_LINKS(project_fkey_command, 0), "project_fkey_command", 20, "Run an 'fkey command' configured in a project.4coder file. Determines the index of the 'fkey command' by which function key or numeric key was pressed to trigger the command.", 175, "C:\\work\\4ed\\code\\4coder_project_commands.cpp", 48, 567 },
{ PROC_LINKS(project_go_to_root_directory, 0), "project_go_to_root_directory", 28, "Changes 4coder's hot directory to the root directory of the currently loaded project. With no loaded project nothing hapepns.", 125, "C:\\work\\4ed\\code\\4coder_project_commands.cpp", 48, 593 },
{ PROC_LINKS(query_replace, 0), "query_replace", 13, "Queries the user for two strings, and incrementally replaces every occurence of the first string with the second string.", 120, "C:\\work\\4ed\\code\\4coder_base_commands.cpp", 45, 982 },
@ -339,7 +339,7 @@ static Command_Metadata fcoder_metacmd_table[185] = {
{ PROC_LINKS(reverse_search_identifier, 0), "reverse_search_identifier", 25, "Begins an incremental search up through the current buffer for the word or token under the cursor.", 98, "C:\\work\\4ed\\code\\4coder_base_commands.cpp", 45, 869 },
{ PROC_LINKS(save, 0), "save", 4, "Saves the current buffer.", 25, "C:\\work\\4ed\\code\\4coder_base_commands.cpp", 45, 1212 },
{ PROC_LINKS(save_all_dirty_buffers, 0), "save_all_dirty_buffers", 22, "Saves all buffers marked dirty (showing the '*' indicator).", 59, "C:\\work\\4ed\\code\\4coder_base_commands.cpp", 45, 1026 },
{ PROC_LINKS(scope_absorb_down, 0), "scope_absorb_down", 17, "If a scope is currently selected, and a statement or block statement is present below the current scope, the statement is moved into the scope.", 143, "C:\\work\\4ed\\code\\4coder_scope_commands.cpp", 46, 731 },
{ PROC_LINKS(scope_absorb_down, 0), "scope_absorb_down", 17, "If a scope is currently selected, and a statement or block statement is present below the current scope, the statement is moved into the scope.", 143, "C:\\work\\4ed\\code\\4coder_scope_commands.cpp", 46, 733 },
{ PROC_LINKS(search, 0), "search", 6, "Begins an incremental search down through the current buffer for a user specified string.", 89, "C:\\work\\4ed\\code\\4coder_base_commands.cpp", 45, 844 },
{ PROC_LINKS(search_identifier, 0), "search_identifier", 17, "Begins an incremental search down through the current buffer for the word or token under the cursor.", 100, "C:\\work\\4ed\\code\\4coder_base_commands.cpp", 45, 858 },
{ PROC_LINKS(seek_alphanumeric_left, 0), "seek_alphanumeric_left", 22, "Seek left for boundary between alphanumeric characters and non-alphanumeric characters.", 87, "C:\\work\\4ed\\code\\4coder_default_include.cpp", 47, 128 },
@ -381,7 +381,7 @@ static Command_Metadata fcoder_metacmd_table[185] = {
{ PROC_LINKS(toggle_virtual_whitespace, 0), "toggle_virtual_whitespace", 25, "Toggles the current buffer's virtual whitespace status.", 55, "C:\\work\\4ed\\code\\4coder_base_commands.cpp", 45, 627 },
{ PROC_LINKS(undo, 0), "undo", 4, "Advances backwards through the undo history.", 44, "C:\\work\\4ed\\code\\4coder_base_commands.cpp", 45, 1164 },
{ PROC_LINKS(word_complete, 0), "word_complete", 13, "Iteratively tries completing the word to the left of the cursor with other words in open buffers that have the same prefix string.", 130, "C:\\work\\4ed\\code\\4coder_search.cpp", 38, 786 },
{ PROC_LINKS(write_and_auto_tab, 0), "write_and_auto_tab", 18, "Inserts a character and auto-indents the line on which the cursor sits.", 71, "C:\\work\\4ed\\code\\4coder_auto_indent.cpp", 43, 651 },
{ PROC_LINKS(write_and_auto_tab, 0), "write_and_auto_tab", 18, "Inserts a character and auto-indents the line on which the cursor sits.", 71, "C:\\work\\4ed\\code\\4coder_auto_indent.cpp", 43, 685 },
{ PROC_LINKS(write_block, 0), "write_block", 11, "At the cursor, insert a block comment.", 38, "C:\\work\\4ed\\code\\4coder_default_include.cpp", 47, 534 },
{ PROC_LINKS(write_character, 0), "write_character", 15, "Inserts whatever character was used to trigger this command.", 60, "C:\\work\\4ed\\code\\4coder_base_commands.cpp", 45, 47 },
{ PROC_LINKS(write_explicit_enum_values, 0), "write_explicit_enum_values", 26, "If the cursor is found to be on the '{' of an enum definition, the values of the enum will be filled in sequentially starting from zero. Existing values are overwritten.", 170, "C:\\work\\4ed\\code\\power\\4coder_experiments.cpp", 50, 496 },

2
4coder_helper/4coder_long_seek.h
View File

@ -1024,7 +1024,7 @@ buffer_line_is_blank(Application_Links *app, Buffer_Summary *buffer, int32_t lin
static int32_t
buffer_get_line_number(Application_Links *app, Buffer_Summary *buffer, int32_t pos){
Partial_Cursor partial_cursor;
Partial_Cursor partial_cursor = {0};
buffer_compute_cursor(app, buffer, seek_pos(pos), &partial_cursor);
return(partial_cursor.line);
}

6
4coder_scope_commands.cpp
View File

@ -351,7 +351,8 @@ CUSTOM_DOC("Finds the scope enclosed by '{' '}' surrounding the cursor and puts
Buffer_Summary buffer = get_buffer(app, view.buffer_id, access);
int32_t start_pos = view.cursor.pos;
int32_t top = 0, bottom = 0;
int32_t top = 0;
int32_t bottom = 0;
if (find_scope_top(app, &buffer, start_pos, FindScope_Parent, &top)){
view_set_cursor(app, &view, seek_pos(top), true);
if (find_scope_bottom(app, &buffer, start_pos, FindScope_Parent | FindScope_EndOfToken, &bottom)){
@ -372,7 +373,8 @@ CUSTOM_DOC("Finds the first scope started by '{' after the cursor and puts the c
Buffer_Summary buffer = get_buffer(app, view.buffer_id, access);
int32_t start_pos = view.cursor.pos;
int32_t top = 0, bottom = 0;
int32_t top = 0;
int32_t bottom = 0;
if (find_next_scope(app, &buffer, start_pos, 0, &top)){
if (find_scope_bottom(app, &buffer, top, FindScope_EndOfToken, &bottom)){
view_set_cursor(app, &view, seek_pos(top), true);